The two ordered phases p(2 X 2) at a coverage 6’ = 0.25 and ifi X fi)R30” at 6 = 0.33 of potassium adsorbed on Ru(O~l) were analyzed by use of low-energy electron-diffraction (LEED). In the (A x fiJR30” phase, the K atoms occupy threefold hcp sites, while in the p(2 x 2) phase the fee site is favoured. In both phases, the K hard-sphere radii are nearly the same and close to the covalent Pauling...

Adsorption of sulfate assists Cu monolayer underpotential deposition (upd) on Au(111) in a unique way, rendering two distinct structural stages: (i) formation of a low-density Cu phase at coverage of 2/3 ML known as the ffiffiffi 3 p ffiffiffi 3 p R30 or honeycomb phase; (ii) formation of a complete monolayer, i.e., Cu-(1 · 1) phase pseudomorphic with respect to underlying Au(111) substrate. In...

Self-assembled monolayers (SAMs) formed from bis(biphenyl-4-yl) diselenide (BBPDSe) on Au(111) and Ag(111) substrates have been characterized by high-resolution X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy, infrared reflection absorption spectroscopy, water contact angle measurements, and scanning tunneling microscopy (STM). BBPDSe was found to form c...

A model of monomer adsorption on infinitely long, finite-width M equilateral triangular lattices with nonperiodic boundaries is presented. The study includes adsorbate-adsorbate first- and second-neighbor interactions with results obtained for repulsive first neighbors. The matrix method and numerical algorithms presented here allow determination of the occupational characteristics of the adsor...

It is found that the adsorption of potassium on Al(111) at 90 K and at 300 K both result in a C&f? X &)R30” structure. Through a detailed LEED analysis it is revealed that at 300 K the adatoms occupy substitutional sites and at 90 K the adatoms occupy on-top sites; both geometries have hitherto been considered as very unusual. The relationship between bond length and coordination is discussed w...

We have characterized the structural properties of submonolayer amounts of Zn on Pd(111) using scanning tunneling microscopy (STM) and spot-profile analysis low energy electron diffraction (SPA-LEED). Following room temperature deposition of ≈0.06 monolayers (ML) Zn onto Pd(111), we observe the substitution of Zn for Pd in the surface layer. At ≈0.20 ML of deposited Zn, STM reveals a locally or...

In this work space-time adaptive processing algorithms for interference rejection in a GNSS receiver are tested under experimental conditions with recorded signals generated by a powerful hardware signal generator. Two space-time adaptive processing algorithms are tested which are implemented in the Stanford University GPS multi-antenna space-time adaptive software receiver. The Multi-output Ad...

BACKGROUND The aim of this study was to define the optimal target concentration of remifentanil which effectively achieves conscious sedation without significant vital sign changes and side effects during spinal anesthesia. METHODS Sixty patients underwent spinal anesthesia with 0.5% hyperbaric bupivacaine (8-16 mg), and were infused with a target controlled infusion (TCI) of remifentanil at ...

The larger of two diuretic hormones of the tobacco hornworm, Manduca sexta, (Mas-DH) is a peptide of 41 residues. It is one of a family of seven currently known insect diuretic hormones that are similar to the corticotropin-releasing factor-urotensin-sauvagine family of peptides. We investigated the possible inactivation of Mas-DH by incubating it in vitro with larval Malpighian tubules (Mt), t...

We investigate the electronic structure of terraces of single layer graphene (SLG) by scanning tunnelling microscopy (STM) on samples grown by thermal decomposition of 6H-SiC(0001) crystals in ultra-high vacuum. We focus on the perturbations of the local density of states (LDOS) in the vicinity of edges of SLG terraces. Armchair edges are found to favour intervalley quasiparticle scattering, le...